Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 74 users online :: 4 registered, 0 hidden and 70 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Piston Valve Safety

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
Sponsored 
  • Author
    Message

Piston Valve Safety

Unread postAuthor: Tidbit77 » Mon Jan 05, 2009 2:58 pm

Im sorry that this is a noob question but would a ball valve attached before the pilot on a piston valve be an effective saftey, and would it effect the performance of the piston valve?
  • 0

"i wonder if i can do that a little lowe- oh apparently no"

"If a little is good.....more is better"

My last words: "Ooooo! what does that do!?!?"
User avatar
Tidbit77
Corporal
Corporal
 
Posts: 74
Joined: Wed Dec 03, 2008 3:01 pm
Location: Ohio
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Mon Jan 05, 2009 3:02 pm

It's adding dead space and possibly constricting flow so performance certainly won't be better. Personally I don't bother with safeties, why not add a mechanical one to whatever it is you're using to trigger your pilot valve?
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: Tidbit77 » Mon Jan 05, 2009 3:06 pm

Ok thanks, I'll construct a mechanical safety instead
  • 0

"i wonder if i can do that a little lowe- oh apparently no"

"If a little is good.....more is better"

My last words: "Ooooo! what does that do!?!?"
User avatar
Tidbit77
Corporal
Corporal
 
Posts: 74
Joined: Wed Dec 03, 2008 3:01 pm
Location: Ohio
Reputation: 0

Unread postAuthor: Hotwired » Mon Jan 05, 2009 8:05 pm

jackssmirkingrevenge wrote:It's adding dead space and possibly constricting flow


Not necessarily.

Tidbit, on my signature cannon there is a safety valve as you described. It does work very effectively.

After firing it with the safety on absolutely nothing happens to the piston valve but if you then open the safety valve the piston valve may then fire a small burst of gas (not the whole chamber) out of the barrel... which may be used for a semi auto I might add.

So if you do forget to take the safety off you need to pump up the vented pilot section back to the chamber pressure again.

If you had a more conventional ball valve on the barrel to physically block the main gas blast you'd have to do a lot more pumping to get it set up again and it stresses the fittings more.
  • 0

User avatar
Hotwired
Lieutenant General
Lieutenant General
 
Posts: 2599
Joined: Fri Oct 13, 2006 5:51 am
Location: UK
Reputation: 0

Return to Pneumatic Cannon Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], Yahoo [Bot]

Reputation System ©'